Electrical apparatus



June 5,1928.

1,672,005 A. J. SORENSEN ELECTRICAL APPARATUS Filed June 25, 1927 I0 'O'IIII'IIIIIIIIIII INVENTOR) A,I Sore/156b,

Q-K" W Patented June 1928.

ANDREW J. SEN OI," WILKINSBURG, PENNSYLVANIA, ASSIGNOR 1'0 THE UNION 8WITCH & SIGNAL GOHPANY, OF SWISSVALE, PENNSYLVANIA, A CORPORATION OF ZPEN N SYLVAN IA.

Application file g1 une 25,

My invention relates to electrical apparatus, and has for an object the provision of noveland improved means for energmng two magnet windings when alternatmg our- -5 rent is supplied to a pair of conductors, and for selectively energizing one or the other of said windings according as direct current of normal or reverse polarity is supplied to said conductors. i I will describe one form of apparatus cmbodying my invention, and will then oint out the novel'features thereof in the c aim.

The'accompanying drawing is a diagrammatic view showing one form of apparatus embodying my invention.

Referring to the drawing, the reference characters X and Y designate a transi'nitting station and a receiving station respectively, which stations are connected by two conductors. One of these conductors is a wire 1,

and as here shown the other conductor comprises Wires 2 and 13 as well as the'ground between the two stations,

1 being connected with the ground at points G and Gr respectively.

Located at the transmitting station X is a source of direct current D, such for: example as a battery, which may be reversibly connected with wires 1 and 2 through a polechanger P, so that direct current of normal or reverse polarity may be supplied to the two conductors. ference character A,

' alternating current Y wires 1 and'2 through a manually operable It will be seen, there fore, that wires 1 and 2 may be supplied with direct current of normal or reverse polarity, or these wires may be supplied with alter- 40 natingcurrent. t

ocated at the receiving station Y is a transformer T having a primary, 3 and two secondaries 4 and 5. ne terminal of the primary 3 is connected with the conductor 1,

and the other terminal of this primary is connected through a condenser 6 with ground at the point G so that the primary 3 forms 7 a part of a path between conductor 1 and ground. Secondary 4 is connected with a rst magnet winding M through a full-wave rectifier R and secondar 5 is connected with a second magnet win ing M through a l-wave rectifier R It follows, thereiore,

that when alternating current is supplied to conductors 1' and 2, both magnet windings to flow through the two latter wires l mc'rnrcar. APPARATUS.

1927.v Serial No. 201,299.

M and M will receive uni-directional current, so that'both of these magnet windings will be energized. v a

A second path is provided between conductor 1 and ground which path includes wire 10, magnet winding M an asymmetric unit 7, and wire 11, 12 and 13. Asymmetric unit 7 permits direct current of normal polarity, but not of reverse polarity, to flow through the magnet winding M A third path is provided between conductor 1 and ground G which path includes wires 10, 15 and 14, magnet winding M an asymmetric unit 8, and wires 12 and 13. lhe asymmetric unit 8 permits direct current of reverse polarity, but not of normal polarity,

magnettwinding M It follows that when direct current of normal. polarity is supplied to the two conductors, magnet winding M will be energized, but magnet winding M will he de-energized, whereas when direct current of reverse pomagnet winding M magnet winding M The condenser 6 from flowing throu former T.

Each of the be of the type willtbe energized and will e de-energized. prevents direct current g the primary 3 of transasymmetric units 7 and 8 may comprising a metal having a compound of the metal formed thereon, which-type of unit is disclosed and claimed in an application filed by L. O. Grondahl on the 7th day of January, 1925, Serial No. or uni-directional current-carrying devices. Each'rectifier R and R may be made up of a plurality of units of the same character.

It will be observed that when direct current of normal polarity is supplied to the two conductors, the rectifier R opposes the flow of such current around magnet winding M whereas when direct current of reverse polarity is supphed to the two conductors, the opposes the flow of such current around magnet winding M Apparatus embodying my invention is particularly suitable for use in connection with the control of the brakes on a railway train. When" used in sources of current, as well as changer P and the circuit controller 9, will usually be located on the locomotive, whereas the two magnet windings M and M as well as the apparatus associated with these wind- 0 scribed only one that when ings, will be located on each car of the train. The conductor 1 will then extend throughout the train, and the ground points G and G will be the wheels and axles of the locomotive and cars, or a second metallic conductor may be provided between points X and Y in place of the ground. The magnet windings M and M may be used to control the brakes in any suitable manner. For example, the control of the brakes may be such both magnet windings M and M an emergency brake apare de-energized,

both of these plication will result; when ma 'net windings are energized, the brakes will be held in running condition; when magnet winding M is energized and magnet winding M de-energized, a service brake application will result; and when magnet M is energized and magnet M is de-energized, the condition which is ordinarily obtained by placing the brake valve in lap position will result. It should be understood, however, that this assignment of functions is capable of variation to meet the requirements of the braking system. The apparatus for the control of the brakes forms no part of my present invention and is omitted from the drawing to-simplify the disclosure.

Although I have herein shown and 'deform of apparatus embodying my invention, it is understood that various changes and modifications may be made therein within the scope of the appended claims without departing from the spirit and scope of my invention.

Having thus described my \Vhat I claim is:

Incombinatiomtwo conductors, means for supplying said conductors with alternating current or with direct current of normal or reverse polarity, a transformer having a primary and two secondaries, a path across said two conductors including said transformer primary and a condenser, two magnet windings connected with said two secondaries respectively, a full wave rectifier interposed between each secondary and the associated magnet winding a second path across said conductors including one of said magnet windings and an asymmetric unit which permits direct current of normal. polarity but not of reverse polarity to flow through said winding, and a third path across said conductors including the other magnet winding and an asymmetric unit which permits direct current of reverse polarity but not of normalpolarity to flow through the winding.

In testimony whereof I afiix my signature.

ANDRE J. SORENSEN.

' invention, 

